Yamaha CS2x Průvodce řešením problémů stáhnout pdf (Strana 20)

EXPERIMENT:

Using a highly percussive amplitude envelope will give a majestic filter sweep little time to develop. As an example, select

Performance TP020. Although you can discern the filter effect with this sound, it is far too short lived. Organ envelopes

are simply invaluable for this type of effect. Try setting both Layers” Amplitude Envelope Decay and Sustain Time to the

maximum +63. Now sit back and listen to the filter as nature had intended!

Organ envelopes aren’t always as useful as in our little example. It is usually important to be able to finely

tune a sound’s volume level over time; for example, most sounds tend to gradually “die away”. A held piano

note would eventually completely disappear. The CS2x however is no piano; leave the Sustain level at a high

enough setting and your note will ring on and on until you release the key (TP021).

Sometimes all that’s required is to “soften” a sound’s initial attack (TP022), say with a brass or solo sound.

Pad sounds like choir and strings usually benefit from even longer fade-in and fade-out times (TP023), but

wait, it isn’t quite that easy. First of all, it is always important to find the right envelope for the right job. A good

example of the different effect created by fading out the filter rather than the volume of your sound can be

found in Preset Performances 015 and 016. Of course it is also good to realize that a sound is the sum of all

of its components. You can spend hours lovingly sculpting your filter envelope, but if your low-pass filter’s

cutoff setting allows all of your sound’s frequencies to pass through unhindered, nothing much will happen.

In short, the interplay between the filter and amplitude envelopes is vital. A few examples.

Illustration: Filter and Amplitude Envelopes

EXAMPLE:

In order for your sound to be affected by specific filter modulation after the release of a key, your amplitude envelope

needs to be longer than your filter envelope. Using a short release setting for your filter envelope (Release Time=-63) will

generate a “tearing” effect, typically used for E-pianos, harpsichords or acoustic guitar sounds. A slight increase in

release time can produce a simple “echo effect” (TP024). Such tricks can also be applied to a sound’s attack time. For

instance, the hard edge introduced by a sound’s fast-attacking filter envelope can be successfully softened by decreas-

ing its amplitude attack time a little (TP025), without the loss of brilliance that would result from decreasing the filter

envelope attack. The moral here is to take the interaction between both envelopes into account at all times.

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Yamaha CS2x Průvodce řešením problémů Strana 20